She's cool and I'm glad that Finn has a qt to bang at some point.
HW as a character is cool, sadly she's just a bit shallow because of her lack of screentime. I'd imagine if her and Finn's relationship was delved into more that there would be a "defrosting the ice queen" thing going on where Finn gets her to open up and not be so standoffish and stoic, kind of mirroring how she taught him stuff in Flute Spell. Could be cool to see.
I'm sad that Finn never really found someone to form a lasting OTP with, even FP and his relationship was pretty lacking in chemistry and wasn't featured enough. Sad my boy never found true love, but HW is still nice.